Wrench.



w. w. PATTERSON.-

WRENCH.

APPLICATION FILED AUG. 6, 1908.

Patented "Dec. 1, 1908.

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UNITED s ArEs PATENT OFFICE.

WILLIAM W. PATTERSON, OF EVANSVILLE, INDIANA, ASSIGNOR OF ONE-HALF TOJOSEPH N. JEROME, OF EVANSVILLE, INDIANA.

WRENCH.

Specification of Letters Patent.

Patented Dec. 1, 1908.

To all whom it may concern:

Be it known that I, WILLIAM W. PATTER- son, a citizen of the UnitedStates, residing at Evansville, in the county of Vandeburg and State ofIndiana, have invented certain new and useful Improvements in Pipe-Vrenches; and I do declare the following tube a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to improvements in pipe wrenches.

The object of the invention is to provide a wrench of this character,the jaws of which may be adjusted by manipulating the handle to causethe same to engage pipes of various sizes, and to firmly grip thelatterwhen pressure is applied to the handle.

With these and other objects in view, the invention consists of certainnovel features of construction, combination and arrangement of parts aswill be described and particularly pointed out in the appended claims.

In the accompanying drawing, Figure 1 is a side view of a wrenchconstructed in accordance with the invention; Fig. 2 is a rear edgeview; Fig. 3 is a side view partly in section; Fig. 4 is a crosssectional view on the line 44 of Fig. 1; and Fig. 5 is a detail sideview of the upper end of the wrench showing a modified form of the outerjaw member.

Referring more particularly tothe drawings, 1 denotes the handle of thewrench, the outer end of which; is providedwith apertured lugs, 2,between which is pivoted the inner end of the inner aw member, 3. Theinner end of the jaw member 3 is reduced to fit between the lugs, 2, ofthe handle and to form shoulders, 4, which are curved or segmental inshape to conform to the curved outer end of the lugs, 2, as shown. Onthe outer end of the lugs, 2, adjacent to the forward edge of the wrenchare projections, 5, which form stops, and are adapted to be engaged withnotches, 6, formed in the adjacent portion of the shoulders, 4:, therebylimiting the movement of the jaw member 3 in this direction. The outerend of the inner jaw member 3 is provided with an enlarged jaw, 7, theouter face of which is notched or provided with serrations, 8. Pivotallymounted on the jaw member 3 below the jaw 7 is a bail-shaped guide, 9,having a squared upper portion to engage the square shoulder formed bythe inner end of the jaw, 7.

Slidably mounted in the bailshaped guide, 9, is an outer jaw membercomprising a shank, 10, on the outer end of which is pivoted an outerhook-shaped jaw, 12, the inner face of which is serrated to co-act withthe serrated face of the inner jaw, 7. The shank, 10, is slidinglyengaged with the guide, 9, and in one side of the shank, 10, is formed alongitudinally disposed groove, 13, with which is engaged a stop pin,14, arranged in one side of the guide as shown, to

limit the outward movement of the shank,

10, and jaw, 12. j The rear edge of the shank, lO, is provided with aseries of ratchet teeth, 15, while the inner edge of the shank, adjacentto "its lower end is beveled out;- wardly as shown at 16,

Pivotally engaged with jacent to its outer end is a bail-shaped lockingpawl, 17, the outerend of which is provided with a rack-engaging edge,18, which the handle 1, ad y is adapted to be engaged with the ratchet v1 teeth, 15, on therear edge of the shank, 10. Formed integralwith theinner pivoted ends of the pawl 17 is a bail-shaped thumb piece, 19,between which and the adjacent edge of the handleis arranged a coiledspring, 20, v

the tension of which is normally exerted to. hold the edge, 18, of thepawl in engagement with the ratchet teeth of the shank,10. By depressingthethumb piece, 19, the pawl, 17

is lifted; todfisengage the edge 18 from-the ratchetfiteeth Jon theshank, thereby permittingsaid shank and the outer jaw to be movedoutwardly for engagement with the pipe or other object to be turned.

In using the wrench, when it is desired to engage the same with a pipe,the thumb piece, 19, is depressed to disengage the pawl from the ratchetteeth on the shank of the outer jaw, after which the hooked end of theouter jaw is engaged with the object to be turned and the aw pulled outto a sufiicient extent to admit the pipe or object between the serratedfaces of the inner and outer jaws, after which the pawl is released andis engaged with the ratchet teeth of the outer jaw shank by the spring20, thus holding the outer jaw against further outward movement. Thehandle, 1, is now manipulated in the proper direction for turning thepipe, which will also cause the pawl, 17, to

draw the outer jaw shank inwardly and the outer jaw into tightengagement wit-h the pipe, thus preventing the jaws from slipping aroundthe pipe and causing the jaws to grip the latter with sufficient forceto enable the same to be turned. To disengage the wrench from the pipeor object, it is simply necessary to depress the thumb piece, 19, andrelease the pawl from engagement with the ratchet teeth on the shank ofthe outer jaw, when the latter may be readily pulled out by drawinginwardly on the handle, thus disengaging the wrench from the pipewithout the necessity of touching any other part of the wrench or forusing more than one hand.

InFig. 5 of the drawings is shown a modified form of the outer awmember, wherein the outer jaw, 12, and its shank, 10, are formed in onepiece.

From the foregoing description, taken in connection with theaccompanying drawing, the construction and operation of the inventionwill be readily understood, without requiring a more extendedexplanation.

Various changes in the form, proportion and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advantages of the invention as defined in theappended claims. 7'

Having thus described my invention, what I claim as new and desire tosecure by Letters-Patent, is

1. In a pipe wrench, a handle, an inner jaw member pivotally connectedto the outer end of said handle, a guide pivotally connected to saidmember, an outer jaw shank slidably mounted in said guide, said shankhavinga longitudinal groove, an outer jaw pivotally connected to theouter end of said shank, a stop pin in said guide to engage the groovein said shank to limit the outward movement thereof, a spring projectedpawl having a pivotal connection with said handle,

and adapted to engage the ratchet teeth on said outer jaw shank, and athumb piece whereby. said pawl is disengaged from said ratchet teeth,substantially as described.

2. In a pipe wrench, a handle, an inner jaw member pivotally connectedto the outer end of said handle, an outer jaw member having a shank, aguide on said inner jaw member adapted to engage said shank and to holdsaid outer jaw in slidable engagement with said inner jaw, a series ofratchet teeth formed on the shank of said outer jaw, a bail-shapedlocking pawl pivotally mount ed on the outer end of said handle, arackengaging edge formed on the outer cross piece or looped end of saidbail-shaped pawl to engage the teeth on said outer jaw shank, aright-angularly formed bail-shaped thumb piece on the inner end of saidpawl, and a spring between the outer loop of said bailshaped thumb pieceand the adjacent side of said handle whereby said pawl is held inoperative engagement with the ratchet teeth on said outer jaw shank.

3. In a pipe wrench, a handle, an inner jaw member pivotally connectedto the outer end of said handle, a guide pivotally c011- nected to theinner jaw member, an outer jaw shank slidably mounted in said guide, anouter aw pivotally connected to said shank, a series of ratchet teeth onsaid shank, a locking pawl, said pawl comprising a bail pivotallyconnected to said handle, a toothengaging edge in said bail adapted tobe engaged with the teeth on the outer jaw shank, a bail-shaped thumbpiece on said bail, and a spring to normally hold said tooth-engagingedge in operative engagement with the teeth on said shank.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

WILLIAM IV. PATTERSON.

Vitnesses: I

LOUIS J. HERMAN, MADGE M. WVEIGERT.

